code: def __init__(self, est, feature, trail):
      self.est = est
      self.feature = feature
      self.trail = trail
  
imports: import logging
  import time
  import pandas
  import numpy
  import numba
  from seedbank import numpy_rng
  from .bias import Bias
  from .mf_common import MFPredictor
  from ..None import util
label_desc: Use image node_id 1 to create a new _FeatContext object  with example: obj = _FeatContext(est, feature, trail)